hakorune/docs/papers/active/paper-c-unified-revolution/experiments/bench_scalar_loop.nyash

// Benchmark 1: スカラ変数ループ性能測定
// 目的: BoxCall最適化でLoad/Store相当の性能を達成することを実証

static box ScalarBench {
    console: ConsoleBox
    
    main() {
        me.console = new ConsoleBox()
        
        // ウォームアップ
        me.warmup()
        
        // 本測定
        me.runBenchmark()
        
        // 比較用: 配列経由の間接アクセス
        me.runIndirectBenchmark()
    }
    
    warmup() {
        me.console.log("=== Warming up ===")
        local x = 0
        loop(x < 1000000) {
            x = x + 1
        }
    }
    
    runBenchmark() {
        me.console.log("\n=== Direct Scalar Loop ===")
        local x = 0
        local iterations = 100000000
        
        local start = new TimeBox()
        local startMs = start.now()
        
        // メインループ: BoxCall("get") + BinOp + BoxCall("set")として表現される
        loop(x < iterations) {
            x = x + 1  // 最適化でレジスタ化されるべき
        }
        
        local end = new TimeBox()
        local elapsed = end.now() - startMs
        
        me.console.log("Iterations: " + iterations)
        me.console.log("Time: " + elapsed + "ms")
        me.console.log("ops/sec: " + (iterations / (elapsed / 1000)))
        me.console.log("ns/op: " + (elapsed * 1000000 / iterations))
    }
    
    runIndirectBenchmark() {
        me.console.log("\n=== Indirect Access (Array[0]) ===")
        local arr = new ArrayBox()
        arr.push(0)  // arr[0] = 0
        local iterations = 100000000
        
        local start = new TimeBox()
        local startMs = start.now()
        
        // 配列経由の間接アクセス（最適化が難しい）
        loop(arr.get(0) < iterations) {
            arr.set(0, arr.get(0) + 1)
        }
        
        local end = new TimeBox()
        local elapsed = end.now() - startMs
        
        me.console.log("Iterations: " + iterations)
        me.console.log("Time: " + elapsed + "ms")
        me.console.log("ops/sec: " + (iterations / (elapsed / 1000)))
        me.console.log("ns/op: " + (elapsed * 1000000 / iterations))
        
        // 速度比を計算して最適化の効果を示す
        me.console.log("\n=== Analysis ===")
        me.console.log("Direct access should be >10x faster than indirect")
    }
}